Improvement in door-locks



parte eine.

N. PETRE, or NEW YORK, N. Y.

Letters Patent No. 94,639, dated September 7, 1869. Y

-*oooh* IMPROVEMENT 1N Doon-Locks.

The Schedule referred to in these Letters Patent and making part of -he same.

To all whom 'it may concern:

Be it known that I, N. PETR, of the city, county, and State of' New York, have invented certain new and useful Improvements in Locks; and I do hereby declare the following to bea full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this specifi` cation, in whichl igure l represents a plan of the interior `of the Figure 2 represents a section through the same.

Figure 3 represents a lock-plate or cover.

Figure 4 represents the key of the lock.

Similar letters of reference, where they occur in the separate drawings, denote like parts of the lock in all of the figures.

This invention relates to a lock having an eccentric, which encloses a concentric turning huh or block, and a spring-bolt and key-pin attachment, whereby the hub may be turned independentof or with the eccentric in inserting the key, locking or unlocking the bolt,

and withdrawing the key, as will be explained.

To enable others skilled in the art to make and use my invention, I will proceed to describe the same, with reference to the drawings.

The bolts A A and wings B B may be cast in one piece, and when this piece is moved to throw out the bolts, as in locking the door, it is so moved aga-inst the 4action of a spring, a, as thatits reaction, when the piece is released, will return said bolts within the lock-case.

C is au eccentric, which can be turned on and around the key-pin b.

This eccentric moves out the bolts A A, and has, at two diainetrie points upon its perimeter, viz, at its points of greatest and least throw, nicks or notches c c, into which a point or projection, d, on .the piece B B takes and holds, by the friction due to the spring a.

Within the eccentric C, there is a turning-hub, D, whichl has a key-opening through it, and below this hub, and through the shell or bottom of the eccentric,

there is a hole, 1, into which' the spring-piu 2 shoots to lock the eccentric to the case, and through which, also, the key-pin ,3 can passv to press back said springpin 2 to unfasten the eccentric, and allow it to be turned by the key, so as to move the bolts A A.

The spring-pin 2 is arranged outside of the 1ockcase, and within a cap or dome, E, secured to the lockcase. Placing this spring-pin 20u the outside of the lock-case, enables me to contract the lock Very materially in thickness.

The key-hole e, in the lockcover F, extends both Ways from the key-pin, so that the key may be inserted either side up. When the key is inserted as far as the hub l), or into said hub, it and the hub may be turned together without turning the eccentric; but when the key is pressed inward and turned, its pin 3 finds the end of the spring-piu 2, and pushing itinward into its chamber in E, the key-pin occupies the hole 1, unlocks or unfastens the eccentric, and by continuing to turn the key and eccentric, the bolts are moved out, while, when the key and eccentric are moved the other way, the reaction of the spring a returns 4thebolts within the lock-case.

The wings B, on the bolt or bolts, are simply to guide and direct the bolt in its movement.

The spring 2z will, under ordinary circumstances, be forcible enough to prevent the eccentric from turning; and a friction-spring may be connected with the hub D, to prevent it from turning, or from becoming loose in the eccentric.

Having thus fully ydescribed my invention,

What I claim therein' as new, and desire, to secure by Letters Patent, is

In combination with a lock-bolt, the eccentric and hub therein, for operating in connection with a pin-key and spring-pin, substantially as and for the purpose described.

N. PETR. Witnesses:

JOHN WALKER, W. S. LIv1NGs'roN,Jr. 

